Lenox Laser Scholarship- “Evaluation of UV LEDs for detection of atmospheric NO2 by photolysis- chemiluminescence”

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Lockheed WP-3D Orion. From NOAA website
Lockheed WP-3D Orion. From NOAA website

 

Evaluation of ultraviolet light-emitting diodes for detection of atmospheric NO2 by photolysis- chemiluminescence
by Ilana B Pollack, Brian M Lerner, and Thomas B Ryerson

This article was accepted to Journal of Atmospheric Chemistry in February of this year, and it details an atmospheric study done in May and June of 2010. Lenox Laser made a total of 3 parts for their studies of different LED detections systems of NO2. For some key background information if one is not familiar, I highly recommend reading this article first:
Flourescence detection of atmospheric nitrogen dioxide using a blue light-emitting diode as an excitation source by Yutaka Matsumi et al. It is much more readable and understandable.

Basically, detection of NO2 in the atmosphere relates to the ozone levels in the atmosphere. Thus, scientists of the field are interested in better, more accurate, and cheaper ways to measure NO2. One of the most recent trends to do so is to use commercially available UV-LEDs in their systems. The systems already often use a UV light source of some kind because in the chemistry of NO2 and related molecules, they will emit light in the process. Atmospheric scientists use this property, called chemiluminescence, to measure the NO2 molecules. Chemiluminescence detection is called P-CL.

In this article, the authors tested 3 UV-LEDs against each other in the P-CL system as shown in the diagram below:

Fig 1 from the paper- schematic of instrumental configuration
Fig 1 from the paper- schematic of instrumental configuration

I recommend reading the article itself to fully understand the diagram and the process. However, this is where Lenox Laser and our calibrated orifices come in. The red section where it says 700um orifice is where our first orifice was used. This is the bypass inlet, and was used to set the sample flow rate and cell pressure for the entire system. They found that the Nichia LEDs were the best overall.

So for the second part of the test, they took the Nichia LEDs on board the NOAA WP-3D aircraft with the P-CL for “on the job” training in the CalNex study. They replaced the more expensive and complicated mass flow controllers were replaced with our critical orifices and mass flow meters. In the diagram above the two places are indicated by arrows in the blue and black section. Replacing the parts in the system did improve the quality, and, as stated in the conclusion, they “eliminate mechanical components with complex flow paths that degrade time response. Replacing mass flow controllers with critical orifices and mass flow meters further simplifies the sample flow path in these laboratory test.”

The NOAA WP-3D aircraft is the plane that flies into hurricanes to monitor and gather information. It took part in CalNex – a study by several universities and institutions of air quality and climate change on the west coast. Our parts were used on board and tested with the UV-LED systems during the study. They even went with the plane as it was briefly diverted from the study to the Gulf of Mexico during the oil spill.

So in conclusion, this research paper incorporates optics, chemistry, and biology with flow technologies, atmospheric studies, and research planes all together, with Lenox Laser parts in the middle of it all!

As always, check out our main website www.lenoxlaser.com to see more of what we do, as well as the rest of this blog. If you have any questions or input, email me at archives@lenoxlaser.com

Service Contract Received from Ophthalmology Lab

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Lenox Laser has recently been awarded an optical service contract from the Ophthalmology Department at University of Maryland.

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Tim Rhodes (pictured left), a veteran Lenox Laser Lab Technician heads up a team of technicians that visits UMD once a week to service, clean, calibrate, repair, and help design their critical equipment. Tim’s precision skills, experience, and tools allow him to do extremely critical tasks on very expensive lab equipment.

Robyn Preist, the clinical manager at the UMD Department of Ophthalmology has been so impressed by Tim’s dedication and skills that they have asked him to work extra hours in order to clean other various equipment.

Towson University e-Commerce Meeting

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On Wednesday May 5th 2004 Lenox Laser met with the e-Commerce student group at Towson University. Joseph d’Entremont founder and president of Lenox Laser presented a digital overview of the company’s website highlighting its current marketing, products, and financial strategies. In this new era of e-Commerce business activity it was exciting to see a student group with sincere enthusiasm and genuine motivation for the future.

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We look forward to the student groups’ visit and tour of our Glen Arm facility. A special thank you goes out to Ms. Laleh M. Srnec part of the Department of Marketing and e-Business , as well as the President and Vice President of e-Commerce group for allowing us to participate in this session.

Students (middle right) envisioning as they look through a microscopic hole drilled through the eye of FDR on the Million Dollar Dime

Pinhole Photography Competition with Goucher

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Lenox Laser made a visit local Goucher College to discuss an innovative new Pinhole Photography study and competition for Goucher College’s nearly 1300 students. Andrea Loepker, school Program Assistant of the Office of International Studies, already runs an International Photography Contest. (Winners are pictured to the right.)

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Lenox Laser hopes to form a partnership with Goucher to help students discover the principles and valuable lessons to be learned from Pinhole Photography Science. Our goal is to set up an annual Pinhole Competition on Campus, to complement the department’s existing competition, as well as introduce a new medium to students.

Company President, Joe d’Entremont met with Goucher Vice-President and Academic Dean, Michael Curry, proposing an upcoming visit to Lenox Laser’s production facilities. It is our vision to work with Goucher in order to aid local students in building upon sound foundational sciences to develop and refine today’s technologies.

e-blox and Coppin State

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e-blox technology can empower Baltimore’s Inner City. Suddenly, everyone can be an engineer. Lenox Laser is pioneering “Intuitive Tools” as a bridge to new millennium learning. e-Imaginative Blox help students help themselves. Designing and constructing real-life applications using simple math, high-tech tools and lot of fun! Join us as we challenge tomorrow’s horizons today…

Joe d’Entremont, President of Lenox Laser envisions a collective effort brining together students from Baltimore’s colleges, universities and high schools. They will participate in a project of discovery that could set the course for the future. Theirs, yours and ours!

Lenox Laser is now a partner with Coppin State University, a local teacher college, to develop and promote Science fair competition all over the area starting with Douglas and a few others.

Also we are seeking a private location for a museum for furthering education and competitions.